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Investment Securities (Tables) | 9 Months Ended
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Sep. 30, 2018
Investment Securities [Abstract] |
Summary of amortized costs and fair value of investment securities |
|  | Sep tember 30, 2018
|  |  | Amortized |  | Gross Unrealized |  | Fair
(dollars in thousands) |  |  | Cost |  | Gains |  | Losses |  | Value
Available for sale |  |  |  |  |  |  |  |  |
US government agencies |  | $ | 8,981 |  | 2 |  | 349 |  | 8,634
SBA securities |  |  | 3,635 |  | - |  | 163 |  | 3,472
State and political subdivisions |  |  | 8,460 |  | 39 |  | 127 |  | 8,372
Asset-backed securities |  |  | 6,583 |  | 13 |  | 10 |  | 6,586
Mortgage-backed securities |  |  |  |  |  |  |  |  |
FHLMC |  |  | 8,012 |  | - |  | 361 |  | 7,651
FNMA |  |  | 30,100 |  | 1 |  | 933 |  | 29,168
GNMA |  |  | 3,168 |  | 1 |  | 166 |  | 3,003
Total mortgage-backed securities |  |  | 41,280 |  | 2 |  | 1,460 |  | 39,822
Total investment securities available for sale |  | $ | 68,939 |  | 56 |  | 2,109 |  | 66,886
|  | De cember 31, 2017
|  |  | Amortized |  | Gross Unrealized |  | Fair
|  |  | Cost |  | Gains |  | Losses |  | Value
Available for sale |  |  |  |  |  |  |  |  |
US government agencies |  | $ | 8,749 |  | 1 |  | 97 |  | 8,653
SBA securities |  |  | 4,087 |  | - |  | 24 |  | 4,063
State and political subdivisions |  |  | 11,242 |  | 179 |  | 25 |  | 11,396
Mortgage-backed securities |  |  |  |  |  |  |  |  |
FHLMC |  |  | 9,102 |  | - |  | 149 |  | 8,953
FNMA |  |  | 29,383 |  | 3 |  | 386 |  | 29,000
GNMA |  |  | 5,618 |  | 2 |  | 82 |  | 5,538
Total mortgage-backed securities |  |  | 44,103 |  | 5 |  | 617 |  | 43,491
Total investment securities available for sale |  | $ | 68,181 |  | 185 |  | 763 |  | 67,603
Summary of fair values investment securities available for contractual maturities |
|  | September 30, 2018
|  | Less than one year |  | One to five years |  | Five to ten years |  | Over ten years |  | Total
(dollars in thousands) |  | Amount |  | Yield |  | Amount |  | Yield |  | Amount |  | Yield |  | Amount |  | Yield |  | Amount |  | Yield
Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US government agencies |  | $ | - |  | - |  | 2,625 |  | 2.12% |  | 6,009 |  | 2.75% |  | - |  | - |  | 8,634 |  | 2.56%
SBA securities |  |  | - |  | - |  | - |  | - |  | - |  | - |  | 3,472 |  | 2.67% |  | 3,472 |  | 2.67%
State and political subdivisions |  |  | - |  | - |  | 816 |  | 2.60% |  | 4,186 |  | 3.09% |  | 3,370 |  | 2.83% |  | 8,372 |  | 2.94%
Asset-backed securities |  |  | - |  | - |  | - |  | - |  | - |  | - |  | 6,586 |  | 2.91% |  | 6,586 |  | 2.91%
Mortgage-backed securities |  |  | - |  | - |  | 3,925 |  | 1.83% |  | 9,119 |  | 1.80% |  | 26,778 |  | 2.48% |  | 39,822 |  | 2.26%
Total |  | $ | - |  | - |  | 7,366 |  | 2.02% |  | 19,314 |  | 2.37% |  | 40,206 |  | 2.59% |  | 66,886 |  | 2.47%
|  | December 31, 2017
|  | Less than one year |  | One to five years |  | Five to ten years |  | Over ten years |  | Total
|  | Amount |  | Yield |  | Amount |  | Yield |  | Amount |  | Yield |  | Amount |  | Yield |  | Amount |  | Yield
Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US government agencies |  | $ | 995 |  | 1.15% |  | 1,503 |  | 2.04% |  | 6,155 |  | 2.40% |  | - |  | - |  | 8,653 |  | 2.20%
SBA securities |  |  | - |  | - |  | - |  | - |  | - |  | - |  | 4,063 |  | 2.45% |  | 4,063 |  | 2.45%
State and political subdivisions |  |  | - |  | - |  | 1,163 |  | 1.96% |  | 7,162 |  | 2.84% |  | 3,071 |  | 2.76% |  | 11,396 |  | 2.73%
Mortgage-backed securities |  |  | 432 |  | 0.99% |  | - |  | - |  | 11,328 |  | 1.84% |  | 31,731 |  | 2.06% |  | 43,491 |  | 1.99%
Total |  | $ | 1,427 |  | 1.10% |  | 2,666 |  | 1.59% |  | 24,645 |  | 2.27% |  | 38,865 |  | 2.15% |  | 67,603 |  | 2.17%
Summary of gross unrealized losses on investment securities and fair market value of related securities |
|  | September 30, 2018
|  |  |  | Less than 12 months |  |  |  |  | 12 months or longer |  |  |  |  |  |  | Total
|  |  |  | Fair |  | Unrealized |  |  |  | Fair |  | Unrealized |  |  |  | Fair |  | Unrealized
(dollars in thousands) |  | # |  | value |  | losses |  | # |  | value |  | losses |  | # |  | value |  | losses
Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US government agencies |  | 3 |  | $ | 3,368 |  | $ | 86 |  | 6 |  | $ | 4,764 |  | $ | 263 |  | 9 |  | $ | 8,132 |  | $ | 349
SBA securities |  | - |  |  | - |  |  | - |  | 2 |  |  | 3,472 |  |  | 163 |  | 2 |  |  | 3,472 |  |  | 163
State and political subdivisions |  | 4 |  |  | 3,491 |  |  | 48 |  | 5 |  |  | 1,935 |  |  | 79 |  | 9 |  |  | 5,426 |  |  | 127
Asset-backed securities |  | 2 |  |  | 3,474 |  |  | 10 |  | - |  |  | - |  |  | - |  | 2 |  |  | 3,474 |  |  | 10
Mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FHLMC |  | - |  |  | - |  |  | - |  | 10 |  |  | 7,651 |  |  | 361 |  | 10 |  |  | 7,651 |  |  | 361
FNMA |  | 4 |  |  | 5,476 |  |  | 60 |  | 23 |  |  | 23,656 |  |  | 873 |  | 27 |  |  | 29,132 |  |  | 933
GNMA |  | 1 |  |  | 1,206 |  |  | 70 |  | 2 |  |  | 1,776 |  |  | 96 |  | 3 |  |  | 2,982 |  |  | 166
Total |  | 14 |  | $ | 17,015 |  | $ | 274 |  | 48 |  | $ | 43,254 |  | $ | 1,835 |  | 62 |  | $ | 60,269 |  | $ | 2,109
|  | December 31, 2017
|  |  |  | Less than 12 months |  |  |  | 12 months or longer |  |  |  |  |  |  | Total
|  |  |  | Fair |  | Unrealized |  |  |  | Fair |  | Unrealized |  |  |  | Fair |  | Unrealized
|  | # |  | value |  | losses |  | # |  | value |  | losses |  | # |  | value |  | losses
Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
US government agencies |  | 5 |  | $ | 4,184 |  | $ | 22 |  | 4 |  | $ | 3,968 |  | $ | 75 |  | 9 |  | $ | 8,152 |  | $ | 97
SBA securities |  | 1 |  |  | 2,936 |  |  | 13 |  | 1 |  |  | 1,127 |  |  | 11 |  | 2 |  |  | 4,063 |  |  | 24
State and political subdivisions |  | 3 |  |  | 1,214 |  |  | 9 |  | 2 |  |  | 792 |  |  | 16 |  | 5 |  |  | 2,006 |  |  | 25
Mortgage-backed securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FHLMC |  | 3 |  |  | 2,897 |  |  | 26 |  | 7 |  |  | 6,056 |  |  | 123 |  | 10 |  |  | 8,953 |  |  | 149
FNMA |  | 11 |  |  | 14,345 |  |  | 135 |  | 13 |  |  | 14,597 |  |  | 251 |  | 24 |  |  | 28,942 |  |  | 386
GNMA |  | 2 |  |  | 2,270 |  |  | 40 |  | 1 |  |  | 971 |  |  | 42 |  | 3 |  |  | 3,241 |  |  | 82
Total |  | 25 |  | $ | 27,846 |  | $ | 245 |  | 28 |  | $ | 27,511 |  | $ | 518 53 |  | $ | 55,357 |  | $ | 763
Summary of other investments |
(dollars in thousands) |  | September 30, 2018 |  | December 31, 2017
Federal Home Loan Bank stock |  | $ | 4,373 |  | 3,754
Investment in Trust Preferred securities |  |  | 403 |  | 403
Other investments |  |  | 153 |  | 305
Total other investments |  | $ | 4,929 |  | 4,462

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